Bruno Lüdke

A 1957 movie, Nachts, wenn der Teufel kam, doubted Lüdke as one of Germany's worst serial killers. Attempts at reopening the case by members of the Kriminalrat (Detective Major) Faulhaber yielded no results. The true nature of the 51 murders remains unsolved.

Lüdke was never put on trial for any of the killings. Declared insane, he was sent to the SS-run Institute of Criminological Medicine in Vienna, where medical experiments were carried out on him until his death, when an experiment went wrong in 1944.

Born in Köpenick, Lüdke had a mild intellectual disability (he could not, for example, tell interrogators how many minutes there were in an hour) and worked as a coachman. He was well known by the local police as a petty thief and peeping tom. On 31 January 1943 a woman was found murdered in the woods near Köpenick, strangled with her own shawl. The victim showed signs of post-mortem sexual abuse and her purse was missing. Police brought in Lüdke for questioning on 18 March 1943, where he quickly confessed to murdering not only the woman but also several other victims, and was taken into custody. Witnesses report Lüdke showed signs of physical abuse and he stated that "they would kill me if I didn't confess".

Bruno Lüdke (3 April 1908 – 8 April 1944) was a German alleged serial killer. Police officials connected him to at least 51 murder victims, mainly women, killed in a 15-year period, which began in 1928 and ended with his arrest in 1943. He was never given a trial, and is considered as innocent.